Terumo 801763, Operator'S Manual, Page: 192 / 359

Roller Pumps
5-25
Master/Follower Mode
Pumps are designated as master and follower in the CCM Configuration area.
Master/follower mode involves two pumps operating in tandem, where the follower
pump demand flow rate or speed is a percentage of the master pump flow rate or
speed. The follower pump flow rate or speed is always equal to or less than the
master pump flow rate or speed. The master pump can be used in Continuous or
Servo modes. The follower pump can only be used in Continuous mode.
High delivery ratios (low follower pump percentages) in combination with low master
pump speed may cause the follower pump to stop rotating, but not deactivate, if the
follower pump speed is not equal to or above 1 RPM. To reduce, but not eliminate,
the probability of the follower pump stopping its rotation at low follower pump
percentages combined with low master pump speed, two small roller pumps should
be employed for master/follower mode.
Master/Follower Pump Control Box
Master and follower controls and data are displayed in one control box. The single
Start/Stop
button is used to start or stop both pumps. The master/follower ratio is
displayed on the follower pump below the speed/flow display. If L/min was chosen as
the display units, then the total flow rate for both pumps will be displayed.
Master Operation
Press the Start/Stop button on the control panel of either the master or follower
pump or touch the Start button on the CCM to start both pumps. Use the master
pump speed control knob or the pump control slide bar to adjust the master pump
speed. The master pump control panel display shows an “M” to the left of the current
RPM or L/min value. The secondary display shows the total flow rate for both pumps
in L/min.
Blood
L/min
0.256
STOP
Cryst
4:1
0.064
0.32
L/min Total
Roller Pump icons
Pump Name
Master/Follower Ratio
Total Flow Rate
Start/Stop button
Speed flow displays
BLOOD
L/min
1/4
0.200
M
0.25 L/min
TOTAL